Patent US5006861A successfully refreshed from Google Patents.
US5006861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna
Assignee: Motorola Solutions Inc
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Filing: 1989-04-20
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Granted: 1991-04-09
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Expires: 2009-04-20
Abstract
Abstract An antenna comprises a conductive helix (10) positioned parallel to a ground plane (12). One end (14) of the helix is coupled to the ground plane (12), while the other end (16) is left open. Radio frequency signals (20) are fed (18) into the open end of the helix to excite the antenna and radiate the radio frequency signal.
Inventors
- 👤 John E. Miller
- 👤 Frank E. Lambrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:23
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/36; H01Q1/362; H01Q11/00; H01Q11/02; H01Q11/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
66 words
An antenna, comprising: a conductive helix having first and second ends, said first end being shorted to a ground plane and said second end being open and free from electrical connections; an open stub positioned partially within said second end of said conductive helix for receiving a radio frequency signal, and for electromagnetically coupling said radio frequency signal into said second end of said conductive helix.
Claim 2
Dependent Claim
66 words
An antenna, comprising: a conductive helix having first and second ends, said first end being shorted to a ground plane and said second end being open and free from electrical connections; an open stub positioned partially within said second end of said conductive helix for receiving a radio frequency signal, and for electromagnetically coupling said radio frequency signal into said second end of said conductive helix.
Claim 3
Dependent Claim
17 words
The antenna of claim 1, including a radio frequency signal source for providing said radio frequency signal.
Claim 4
Dependent Claim
17 words
The antenna of claim 2, wherein said radio frequency signal source comprises a radio frequency power amplifier.
Claim 5
Dependent Claim
61 words
An antenna, comprising: a conductive helix having first and second ends, said first end being shorted to a ground plane and said second end being open and free from electrical connections; an open stub positioned partially within said second end of said conductive helix for receiving a radio frequency signal being electromagnetically coupled from said second end of said conductive helix.
Claim 6
Dependent Claim
61 words
An antenna, comprising: a conductive helix having first and second ends, said first end being shorted to a ground plane and said second end being open and free from electrical connections; an open stub positioned partially within said second end of said conductive helix for receiving a radio frequency signal being electromagnetically coupled from said second end of said conductive helix.
Claim 7
Dependent Claim
69 words
An antenna, comprising: a conductive helix being constructed and arranged parallel to a conductive ground plane, said conductive helix having a first end shorted to said ground plane and a second end being open and free from electrical connections; an open stub positioned partially within said second end of said conductive helix for receiving a radio frequency signal being electromagnetically coupled from said second end of said conductive helix.
Claim 8
Dependent Claim
69 words
An antenna, comprising: a conductive helix being constructed and arranged parallel to a conductive ground plane, said conductive helix having a first end shorted to said ground plane and a second end being open and free from electrical connections; an open stub positioned partially within said second end of said conductive helix for receiving a radio frequency signal being electromagnetically coupled from said second end of said conductive helix.
Claim 9
Dependent Claim
82 words
An antenna, comprising: a conductive helix being constructed and arranged parallel to a conductive ground plane, said conductive helix having a first end shorted to said ground plane and a second end being open and free from electrical connections; an open stub positioned partially within said second end of said conductive helix for receiving a radio frequency signal, and for electromagnetically coupling said radio frequency signal into said second end of said conductive helix so as to radiate said radio frequency signal.
Claim 10
Dependent Claim
82 words
An antenna, comprising: a conductive helix being constructed and arranged parallel to a conductive ground plane, said conductive helix having a first end shorted to said ground plane and a second end being open and free from electrical connections; an open stub positioned partially within said second end of said conductive helix for receiving a radio frequency signal, and for electromagnetically coupling said radio frequency signal into said second end of said conductive helix so as to radiate said radio frequency signal.
Claim 11
Dependent Claim
21 words
The antenna of claim 6, wherein said conductive helix is laterally positioned so as to be parallel with said ground plane.
Claim 12
Dependent Claim
70 words
An antenna, comprising: a conductive helix being constructed and arranged parallel to a ground plane, said conductive helix having a first end shorted to said ground plane and a second end being open and free from electrical connections; an open stub positioned partially within said second end of said conductive helix for exciting said conductive helix by providing a radio frequency signal into said second end of said conductive helix.
Claim 13
Dependent Claim
70 words
An antenna, comprising: a conductive helix being constructed and arranged parallel to a ground plane, said conductive helix having a first end shorted to said ground plane and a second end being open and free from electrical connections; an open stub positioned partially within said second end of said conductive helix for exciting said conductive helix by providing a radio frequency signal into said second end of said conductive helix.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-04-08 | 1994-10-08 | 1995-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-08 | 1998-10-08 | 1999-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-08 | 2002-10-08 | 2003-04-09 | $7700.00 | Window Closed / Lapsed |